/* 全局样式 */
:root {
    --primary-color: #0d6efd;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --dark-color: #212529;
    --light-color: #f8f9fa;
    --border-radius: 8px;
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --box-shadow-lg: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

/* 基础样式重置 */
* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

/* 导航栏样式 */
.navbar {
    box-shadow: var(--box-shadow);
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: 6px;
    margin: 0 2px;
}

.navbar-nav .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

/* 主要内容区域 */
.main-content {
    min-height: calc(100vh - 200px);
    /*padding-top: 2rem;*/
}

/* 卡片样式 */
.card {
    border-radius: var(--border-radius);
    border: none;
    box-shadow: var(--box-shadow);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--box-shadow-lg);
    transform: translateY(-2px);
}

.card-header {
    border-bottom: 1px solid #e9ecef;
    font-weight: 600;
}

/* 功能卡片 */
.feature-card {
    transition: all 0.3s ease;
    cursor: pointer;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-lg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    font-size: 2rem;
}

/* 英雄区域 */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.1)" points="0,1000 1000,0 1000,1000"/></svg>');
    background-size: cover;
}

.hero-chart {
    position: relative;
    z-index: 2;
}

/* 统计数据 */
.stat-item h3 {
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-card {
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-3px);
}

/* 交易所标志 */
.exchange-logo {
    transition: all 0.3s ease;
    cursor: pointer;
}

.exchange-logo:hover {
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-lg);
}

.exchange-icon {
    border-radius: 4px;
}

/* 表格样式 */
.table {
    margin-bottom: 0;
}

.table th {
    font-weight: 600;
    border-bottom: 2px solid #dee2e6;
    background-color: var(--light-color);
}

.table td {
    vertical-align: middle;
    border-bottom: 1px solid #f0f0f0;
}

.table-hover tbody tr:hover {
    background-color: rgba(var(--primary-color), 0.05);
}

/* 按钮样式 */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    padding: 0.5rem 1rem;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #146c43 100%);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #b02a37 100%);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #e0a800 100%);
    color: #000;
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color) 0%, #0aa2c0 100%);
    color: #000;
}

/* 表单样式 */
.form-control,
.form-select {
    border-radius: var(--border-radius);
    border: 1px solid #ddd;
    transition: all 0.3s ease;
    padding: 0.75rem 1rem;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.form-label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #555;
}

/* 徽章样式 */
.badge {
    border-radius: 6px;
    font-weight: 500;
    padding: 0.5em 0.75em;
}

/* 分页样式 */
.pagination .page-link {
    border-radius: var(--border-radius);
    margin: 0 2px;
    border: 1px solid #ddd;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.pagination .page-link:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-1px);
}

.pagination .page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* 模态框样式 */
.modal-content {
    border-radius: var(--border-radius);
    border: none;
    box-shadow: var(--box-shadow-lg);
}

.modal-header {
    border-bottom: 1px solid #e9ecef;
    background-color: var(--light-color);
}

/* 加载动画 */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.pulse {
    animation: pulse 2s infinite;
}

/* 用户中心样式 */
.user-avatar {
    position: relative;
}

.user-stats .col-4 {
    border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.user-stats .col-4:last-child {
    border-right: none;
}

.account-item {
    transition: all 0.3s ease;
}

.account-item:hover {
    background-color: var(--light-color) !important;
    transform: translateX(5px);
}

.profit-stats .stat-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid #f0f0f0;
}

.profit-stats .stat-item:last-child {
    border-bottom: none;
}

.notification-item {
    transition: all 0.3s ease;
    border-left: 4px solid var(--primary-color);
}

.notification-item:hover {
    background-color: white !important;
    box-shadow: var(--box-shadow);
}

/* 登录/注册页面 */
.login-section,
.register-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.benefit-item {
    transition: all 0.3s ease;
}

.benefit-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--box-shadow);
}

/* 资金费率页面 */
.funding-rate-section .stat-card {
    border-left: 4px solid var(--primary-color);
}

.funding-rate-section .stat-card:nth-child(2) {
    border-left-color: var(--success-color);
}

.funding-rate-section .stat-card:nth-child(3) {
    border-left-color: var(--danger-color);
}

.funding-rate-section .stat-card:nth-child(4) {
    border-left-color: var(--info-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-section .display-4 {
        font-size: 2rem;
    }

    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }

    .card-body {
        padding: 1rem;
    }

    .table-responsive {
        font-size: 0.875rem;
    }

    .user-stats .row {
        text-align: center;
    }

    .user-stats .col-4 {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        padding-bottom: 0.5rem;
        margin-bottom: 0.5rem;
    }

    .user-stats .col-4:last-child {
        border-bottom: none;
        margin-bottom: 0;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .card {
        margin-bottom: 1rem;
    }

    .btn-group .btn {
        padding: 0.25rem 0.5rem;
        font-size: 0.75rem;
    }

    .modal-dialog {
        margin: 1rem;
    }

    .table td,
    .table th {
        padding: 0.5rem;
        font-size: 0.8rem;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
        color: #e0e0e0;
    }

    .card {
        background-color: #2d2d2d;
        border-color: #404040;
    }

    .table {
        color: #e0e0e0;
    }

    .table th {
        background-color: #404040;
        border-color: #555;
    }

    .table td {
        border-color: #555;
    }

    .form-control,
    .form-select {
        background-color: #ffffff;
        border-color: #ddd;
        color: #333;
    }

    .form-control:focus,
    .form-select:focus {
        background-color: #ffffff;
        border-color: var(--primary-color);
        color: #333;
    }

    .modal-content {
        background-color: #2d2d2d;
        color: #e0e0e0;
    }

    .modal-header {
        background-color: #404040;
        border-color: #555;
    }
}

/* 打印样式 */
@media print {
    .navbar,
    .btn,
    .pagination,
    .modal {
        display: none !important;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }

    .table {
        font-size: 0.8rem;
    }

    body {
        background: white;
        color: black;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

/* 工具类 */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.border-gradient {
    border: 2px solid;
    border-image: linear-gradient(135deg, var(--primary-color), var(--info-color)) 1;
}

.shadow-sm {
    box-shadow: var(--box-shadow) !important;
}

.shadow-lg {
    box-shadow: var(--box-shadow-lg) !important;
}

.rounded-lg {
    border-radius: 1rem !important;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
}

.bg-gradient-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #146c43 100%);
}

.bg-gradient-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #b02a37 100%);
}